a=int(input())
c=[0]*10
for i in range(0,a):
  b=list(input().split(" "))
  if b[4]=='NO':
    for j in range(0,4):
      c[int(b[j])]-=1
  else:
    for j in range(0,4):
      c[int(b[j])]+=1
print(c.index(max(c)))